ICP-MS测定小米中的22种元素及营养价值分析  

Determination of 22 elements in millet by ICP-MS and analysis of nutritional value

作　　者：贺丽霞 闫伟伟 梁伟 狄慧 HE Li-xia;YAN Wei-wei;LIANG Wei;DI Hui(Zhangjiakou Food and Drug Inspection Center,Zhangjiakou,075000,China;Xuanhua District People's Hospital,Zhangjiakou,075100,China)

机构地区：[1]张家口市食品药品检验中心,河北张家口075000 [2]张家口市宣化区人民医院,河北张家口075100

出　　处：《粮食与饲料工业》2023年第6期70-75,共6页Cereal & Feed Industry

基　　金：河北省市场监督管理局科研计划项目(2021ZD36)。

摘　　要：以18种市售小米样品为研究对象,通过微波消解-电感耦合等离子体质谱仪(ICP-MS)测定样品中22种元素的含量。样品采用微波消解法,在碰撞反应池(KED)模式下进行测定,利用降维-因子分析方法对18批次小米中的22种元素进行分析,将22种变量降为9种变量,并对其食用价值作出客观性评价。22种元素的线性回归方程相关系数均在0.998以上,检出限在0.0011~14.10μg/L,相对标准偏差在0.3%~9.9%,加标回收率在82.20%~112.92%。结果表明,小米是典型的高钾低钠食品,其高含量元素和主成分元素有益于调节血压和保护心血管。In this study,the contents of 22 elements in 18 millets were determined by Microwave Digestion-Inductively Coupled Plasma Mass Spectrometry(ICP-MS).The samples were determined in the collision reaction cell(KED)mode by microwave digestion method.The 22 elements in 18 batches of millet were analyzed by dimension reduction factor analysis method.The 22 variables were reduced to 9 variables,and their edible value was objectively evaluated.The correlation coefficients of the linear regression equations of the 22 elements were all above 0.998,the detection limit(LOD)was 0.0011-14.10μg/L,the relative standard deviation was 0.3%-9.9%,and the spiked recoveries were 82.20%-112.92%.The results showed that millet was a typical food with high potassium and low sodium,and its high content of elements and main components were beneficial to regulating blood pressure and protecting cardiovascular system.

关 键 词：小米 电感耦合等离子体质谱 元素 因子分析 营养价值 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程] O657.6[轻工技术与工程—食品科学与工程]